Dont know what to do 😩

This may be long so sorry 🤦🏼‍♀️ me and my partner ate currently expecting our first baby together. He has two children from a previous relationship and we have then twice a week over night.

The last few days ive been getting anxious about the situation and its starting to upset me as i feel like how he parents the two boys is different to how i would personally parent. So how does it work when the baby is born?

As an example last night he was being demanded to i want this, get me that, i want this on tv etc and my partner just does what hes told. I was cooking us all dinner and my partner asked oldest to help him with tbe table he ignored him and just sat down, my partner done it alone and then said i asked u for help to which son said “well i didnt wanna” and that was it end of convo.

Then it may sound silly but we had mac and cheese and the cheese on top crisped up more than usual, we all sat down to eat and the comments started “this is burnt” “not eating that” etc which i ignored then they was picking food up and throwing it back at their plates and laughing again saying not eating that, this is awful etc etc and my partner just sat there. Oldest then got up from the table and went and helped himself to an ice lolly and sat else where even though the rest of us were still eating again my partner said nothing.

Maybe its just me and im being hormonal and over sensitive but i feel like its rude and if it was down to me we would sit and eat as a family and not have children leaving the table when they want and helping themselves to pudding when they want.

And its upset me that my partner just sat there and said nothing about any of the behaviour that i found rude 🤷🏼‍♀️

So i guess my question is am i in the wrong to feel this way? What to do we when babies born because i will want to do things differently to maybe how things are now. Has anyone been in this situation? This is just one example but there are other things that come up that i would do differently or find rude but i wont go on 😂